Provided is an automatic trigger module for electronic cigarette, comprising a circuit board, a sensor and a sealing seat. The sensor is provided on the circuit board, and the circuit board is provided with a first vent hole at the position corresponding to the sensor and a first connection. The sealing seat is provided with a second vent hole. The circuit board and the sensor are arranged on the sealing seat, with the sensor being inserted into the second vent hole. Therefore, it is an object of the present disclosure to solve the problem of resource waste due to the unreplaceable automatic trigger module in the electronic cigarette of the prior art. The present disclosure also provides an electronic cigarette using the automatic trigger module.